The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 1980
Filed:
Jul. 25, 1977
Applicant:
Inventors:
Teruji Tsuji, Takatsuki, JP;
Mitsuru Yoshioka, Toyonaka, JP;
Takahiro Kataoka, Shiga, JP;
Yuji Sendo, Itami, JP;
Shoichi Hirai, Ibaraki, JP;
Takashi Maeda, Kobe, JP;
Wataru Nagata, Nishinomiya, JP;
Assignee:
Shionogi & Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 16 ; 544 21 ; 544 27 ; 544 28 ; 544 30 ;
Abstract
A process for preparing free carboxylic acids which comprises treating an optionally substituted benzyl ester with a Lewis acid, preferably in the presence of a cation acceptor, followed by hydrolysis, if required.